SI Prefixes

9.3. SI Prefixes#

The table below contains SI prefixes ranging from \(10^{30}\) to \(10^{−30}\) that are currently recognized and used.

Prefix

Symbol

Meaning

quetta-

Q

\(10^{30}\)

ronna-

R

\(10^{27}\)

yotta-

Y

\(10^{24}\)

zetta-

Z

\(10^{21}\)

exa-

E

\(10^{18}\)

peta-

P

\(10^{15}\)

tera-

T

\(10^{12}\)

giga-

G

\(10^{9}\)

mega-

M

\(10^{6}\)

kilo-

k

\(10^{3}\)

hecto-

h

\(10^{2}\)

deka-

da

\(10^{1}\)

deci-

d

\(10^{–1}\)

centi-

c

\(10^{–2}\)

milli-

m

\(10^{–3}\)

micro-

\(\mu\)

\(10^{–6}\)

nano-

n

\(10^{–9}\)

pico-

p

\(10^{–12}\)

femto-

f

\(10^{–15}\)

atto-

a

\(10^{–18}\)

zepto-

z

\(10^{–21}\)

yocto-

y

\(10^{–24}\)

ronto-

r

\(10^{-27}\)

quecto-

q

\(10^{-30}\)